Red indicator meaning?

• A. Red — unsafe or in-transit
• B. Red — down and locked
• C. Red — gear up
• D. Red — unknown

Answer: (A)

Indicator lights use color to convey urgency and status. Red is reserved for warnings and conditions that require immediate attention. In aviation systems, a red indicator signals that something is unsafe, not ready for operation, or the item is not in a safe configuration (including being in transit). That’s why red — unsafe or in-transit is the best interpretation.

Other states like gear-down/locked or gear-up are not typically shown with a red warning light; those statuses are represented by non-red cues (such as green/white indicators or separate position lights). And red isn’t used to indicate an unknown state.